Adjustable pulley-gear.



No. 633,426. Patented Sept. l9, I899.

6. CODE &. H. KNUDSEN.

ADJUSTABLE PULLEY GEAR.

(Application filed July 10, 1899.)

2 Sheets-Sheet (No Model.)

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' No. 633.426. Patented Sept. l9, I899.

G. CODE 8:. H. KNUDSEN.

ADJUSTABLE PULLEY GEAR.

(Application filed July 10. 1899,) (No Model.) 2 Sheets-Sheet 2 UNITED STATES PATENT ()FFICYE.

GEORGE CODE AND HANS KNUDSEN, OF BOSTON, MASSACHUSETTS, ASSIGN- OBS TO THE LIQUID AIR, POWER AND AUTOMOBILE COMPANY, OF WEST VIRGINIA.

ADJUSTABLE PU LLEY-G EAR.

SPECIFICATION forming part of Letters Patent No. 633,426, dated September 19, 1899.

Application filed July 10,1899. Serial No. 723,318. (No model.)

To ail whom, it 71mg concern:

Be it known that we, GEORGE CODE, a subject of the Queen of Great Britain, and HANS KNUDSEN, a citizen of the United States, residents of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Adjustable Pulley-Gears, of which the following is a specification.

The object of our invention is to produce an adjustable pulley-gear composed of two sections adjustable in relation to each other, one pulley being driven from any suitable source and transmitting motion to the other pulley by means of a flat or straight belt, said pulleys being adjusted upon their shafts so that the desired speed is transmitted from the driving to the driven pulley.

The invention consists in the peculiar construction and arrangement of parts as hereinafter set forth, and pointed out in the claims.

Referring to the accompanying drawings, Figure 1 represents a plan or top view, partly in section, of an apparatus embodying our invention. Fig. 2 is a side view of the apparatus. Fig. 3 is a view, partially in elevation and partially in section, of one of the hubs for the toggle-joint levers. Fig. 4 is a section taken on line a: a; of Fig. 3 with the lower togglelever removed. Fig. 5 is a face View of one of the hubs, showing the recess for holding the pins of the toggle-joint levers in place. Fig. 6 is a side view of one of the disks or plates. Fig. 7 is a horizontal section of the central portion of same. Fig. 8 is a plan or top view of one of the sections of the bearingsurface of the pulley to work in the slots in the disk. Fig. 9 is a side View of same. Fig. 10 is a side view, partially in section, of one of the shipper-levers. Fig. 11 is a plan or top view of same.

A represents the supporting-frame, upon which are secured bearings B B, in which are mounted parallel shafts C C, each having a feather 0. Near the central portion of each shaft are mounted two disks D D, each having a number of radial slots cl and each formed with a large central opening. On each side of each of said disks is placed a plate E, said plates and disks being secured together by means of bolts F, and between the plates is arranged a spiral spring G to assist in keeping the disks apart the required distance, but allowing them to approach each other when required. In each of the slots 01 of the disks D is arranged a section of the bearing-surface of the pulley H, having recesses it near each end, (see Figs. 8 and 9,) so as to embrace the disk on both sides, and the ends of these sections H are furcated, to which are ful= crumed toggle-levers I, the outer ends of which are fulcrumed to hubs J, mounted upon and free to slide on the shafts O and rotate therewith. The hubs are formed in three parts K K K as shown in Fig. 4, the central portion K being formed with an annular groove is, in which the ends of pins i on the toggle-levers I fit, slot it being also formed in said central portion for the levers I to work in, and the inner part or cover K is also formed with corresponding slots for said 1evers I to work in, but is flat at its rear side to hold the pins '5 in the groove 76. The outer end of the portion K is formed with an extended hub having a cover K The end of the hub and cover is cut out so as to form an annular recess in which is arranged a ring K L L are shipper-levers pivoted at their center M to the frame A and formed at each of their outer ends with a slot in which works a screw on, that connects the end of the lever to the ring K on the hubs J.

To the frame A, between the shipper-levers L, is secured a block N, to which are fulcrumed two cog-wheels P P in gear with each other, and to each of the fulcrums of said wheels is secured one end of an elbow-joint Q Q, the outer end of which is attached to the shipper-levers, as shown. (See Fig. 1.) The rod R, forming the fulcrum of one of the wheels P, extends upward and is fitted with a crank-handle, as shown in Fig. 2, so that by turning said handle a partial revolution is imparted to the wheels P P and the shipper-levers drawn closer together or forced farther apart, according to the direction in which the handle is turned, thus regulating the eXpan sion and contraction of the pulleys and the speed of the driven pulley.

The operation is as follows: Motion is first transmitted to the driving-shaft C from any suitable source and by means of a belt S, passing over the surface-bearing sections H of the adjustable pulleys, imparts motion to the driven shaft 0. Thus if the shipper-levers are parallel both shafts will be rotated at the same speedg'but if said shipper-levers are expanded or contracted by means of the lever B, gears P P, and elbow-joints Q Q the position of the shipper-levers Will be adjusted so as to expand one of the pulleys and contract the other, and the speed of the driven shaft is thus regulated.

What we claim is- 1. An adjustable pulleygear comprising two parallel shafts, each having mounted thereon two disks adjustable in relation to each other, and having slots in which are mounted, so as to slide freely, adjustable surface-bearing sections, toggle-levers connected to same and to sliding hubs mounted upon the shaft for regulating the relative diameters of the adjustable surface-bearing sections and the speed of same, as set forth.

2. An adjustable pulley-gear having two parallel shafts, two disks mounted on each of said shafts so as to slide freely, and having a number of radial slots, a surface-bearing section mounted in each of said radial slots, toggle-levers connected to the outer ends of said section and being connected by toggle-levers to mechanism for operating them, substantially as set forth.

3. In an adjustable pulley-gear having two parallel shafts, disks having radial slots, plates free to slide upon the shafts secured to the central portions of said disks, surfaceradial slots, toggle-levers Working in said slots, their ends being held in the annular recess as described, the outer or rear surface of the central portion of said hub having an extension and a cover, the said extension and cover having an annular recess, and a shipper-lever for operating same, substantially as set forth.

5. In an adjustable pulley-gear, shipper-levers for operating same, two central cogwheels an elbow-joint by which each wheel is connected to its shipper-lever and an operating-lever connected to one of said cog-Wheels whereby when said lever is moved in one direction, the arms of the shipper-levers to which the cogwheels are connected,will be expanded or contracted according to the movement of the cog-wheels, as set forth.

In testimony whereof we have affixed our signatures in presence of two Witnesses.

GEORGE CODE. HANS KNUDSEN.

IVitnesses:

HUBERT J. MOLAUGHLIN, EDWIN PLANTA. 

